From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sheng Yang <sheng@linux.intel.com>
Subject: Re: [PATCH][v2] Hybrid extension support in Xen
Date: Tue, 2 Feb 2010 22:22:18 +0800
Message-ID: <201002022222.18846.sheng@linux.intel.com>
References: <201002021616.19189.sheng@linux.intel.com>
	<1265118605.2965.23089.camel@zakaz.uk.xensource.com>
	<20100202140047.GB7099@whitby.uk.xensource.com>
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To: Tim Deegan <Tim.Deegan@citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, Ian Campbell <Ian.Campbell@citrix.com>, Keir Fraser <Keir.Fraser@eu.citrix.com>
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On Tuesday 02 February 2010 22:00:47 Tim Deegan wrote:
> At 13:50 +0000 on 02 Feb (1265118605), Ian Campbell wrote:
> > I wonder if we could turn things around and have the guest pick some
> > pages and tell the hypervisor to put the grant table there, removing the
> > need to reserve any of the physical address space up front.
> 
> Yes; this is how all existing PV-on-HVM drivers work, using the
> grant-table hypercall.  I don't see the need to add another mechanism.

...Not quite understand. I think the PV-on-HVM drivers reserved the memory 
space in QEmu provided device's MMIO space, similar to what I did here(except 
reserved in BIOS)?...

-- 
regards
Yang, Sheng